/*******************************************************************************
 * Copyright IBM Corp. and others 2020
 *
 * This program and the accompanying materials are made available under
 * the terms of the Eclipse Public License 2.0 which accompanies this
 * distribution and is available at https://www.eclipse.org/legal/epl-2.0/
 * or the Apache License, Version 2.0 which accompanies this distribution and
 * is available at https://www.apache.org/licenses/LICENSE-2.0.
 *
 * This Source Code may also be made available under the following
 * Secondary Licenses when the conditions for such availability set
 * forth in the Eclipse Public License, v. 2.0 are satisfied: GNU
 * General Public License, version 2 with the GNU Classpath
 * Exception [1] and GNU General Public License, version 2 with the
 * OpenJDK Assembly Exception [2].
 *
 * [1] https://www.gnu.org/software/classpath/license.html
 * [2] https://openjdk.org/legal/assembly-exception.html
 *
 * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0 OR GPL-2.0-only WITH OpenJDK-assembly-exception-1.0
 *******************************************************************************/

#include "lljb/Module.hpp"

#include "llvm/IRReader/IRReader.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/SourceMgr.h"


namespace lljb
{

Module::Module(
      const char * filename,
      llvm::SMDiagnostic &SMDiags,
      llvm::LLVMContext &context) :
   _llvmModule(nullptr),
   _constructed(false),
   _filename(filename)
   {
   _llvmModule = (llvm::parseIRFile(_filename, SMDiags, context));
   if (!_llvmModule)
      {
      SMDiags.print(_filename, llvm::errs());
      }
   else
      {
      _constructed = true;
      }
   llvm::outs() << "Module loaded:" << _llvmModule->getModuleIdentifier() << "\n";
   }

llvm::Function *
Module::getMainFunction()
   {
   if (numFunctions() == 1)
      return &(*(funcIterBegin()));
   return _llvmModule->getFunction("main");
   }

} // namespace lljb
